Whenever Aatrox uses an ability that costs health, he stores 100% of the health cost into his Blood Well. The maximum amount of health the Blood Well can store is equal to 30 + (45 x level). If Aatrox has not dealt or received damage in the last 5 seconds, his Blood Well will deplete at a rate of 2% per second.

Upon taking fatal damage, Blood Well activates and places Aatrox in stasis for 3 seconds. Over the stasis duration the Blood Well is emptied and Aatrox restores health equal to its contents plus 10.5 + (15.75 x level). Blood Well's activation has a static cooldown and is unaffected by cooldown reduction.

Also, Aatrox passively increases his attack speed by 1% for every 2% in the Blood Well(30/35/40/45/50/55% upgrades every 3 champion levels)

Cooldown: 225/200/175/150 (at levels 1/6/11/16)

Dark Flight

Q

Aatrox takes flight and slams down at a targeted location, dealing physical damage in a large area. Enemies in the center of the blast are also knocked up for 1 second.

Range: 650Cooldown: 16 / 15 / 14 / 13 / 12Cost: 10% of current health

Physical Damage: 70 / 115 / 160 / 205 / 250 (+ 60% bonus AD)

Blood Thirst

W

Toggle Off: Aatrox heals himself on every third attack. If Aatrox is below 50% health he will heal for three times as much.